have a look under a ma61 centre console.... there is apparently a temp sensor for the climate control, and from what i could tell... looks like an air pump.
But you can swap in the celica centre console, it does fit, but without the climate control temp sensor thing hooked up, all you get it lovely HOT air. PITA in summer
So you fixed the hot air problem , I just got another climate control sensor thingy this time with a pipe as the one in the car at the moment doesn't have that pipe
As for the cruise control computer, I don't know but I am sure it's possible if you got all the parts...